Leaf-turning device



June 24, 1930. M, YAHOLNITSKY 1,768,018

LEAF TURNING DEVICE Filed Sept 4, .1923 2 Sheets-Sheet 1 ATTORNEY 7. June 24, 1930. M. YAHOLNITSKY mm TURNING nsvxcn FiLgd Sept. 4, 1928 ZSheets-Sheet 2 ATTORNEY Patented June 24, 1930 METRO YAHOLNI'ISKY, or RHEIN, SASKATCHEWAN, cazmnn LEAF-TURNING DEVICE Application fled September 4, 1928. Serial No. 803,808.

This invention relates to leaf turning devices and has for an object the provision of means for singly moving a plurality of arms about a given center to successively turn a plurality of leaves in one direction, and to simultaneously move all of said'arms in an opposite direction for the return of the leaves to their normal positions, the invention being especially adapted for handling sheet music.

Another object of the invention is the provision of novel" means for singly and successively engaging and turning the arms, so that the leaves may be singly and successively turned, together with foot operated means for actuating the arm turning means and foot operated means for returning the leaves to their normal positions.

With the above and other objects in view,

33 the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings:

Figure 1 is a perspective view illustrating the invention applied to a music stand.

Figure 2 is a fragmentary bottom plan view showing a portion of the music stand 39 with the invention applied.

Figure 3 is a fragmentary elevation of the parts shown in Figure 2.

Figure 4 is a section on the line 4-4 of Figure 3.

Figure 5 is a section on the line 55 of Figure 4.

Referring to the drawings in detail wherein like characters of reference denote corresponding parts, the invention as illustrated comprises a bracket 10 which may be mounted upon a suitable music support, the bracket being shown as applied to a collapsible music stand. The bracket is se-, cured to the bottom rail 11 of the stand and for this purpose, this rail may be cut away as shown at 12 to receive an arm 13 of the bracket. This arm provides a bearing for a shaft 14 which is also mounted in a bearing provided in an arm 15 of the bracket.

5 Mounted for free rotation upon the shaft 14 are the inner ends of arms '16. Any suitable number of these arms may be employed, three being shown arranged in superimposed relation upon the shaft. The arms are held against sliding movement upon the shaft by means of a disk 17 which is secured upon said shaft.

Mounted for free rotation upon the shaft 14 is a disk 18. This disk carries a cam flange 19 which has extending therefrom a lug 20. This lug is adapted to successively engage behind each of the arms 16 and for this purpose, a spring 21 is mounted upon the shaft 14 and has one of its ends secured to a sleeve 22 which is carried by the disk 18. The opposite end of the spring 21 bears against and is'secured to the arm 15 of the bracket 10.

Pivotally mounted upon the bracket 10 as shown at 23 is a bell crank lever 24. One arm of this lever is connected to the disk 18 by means of a link 25 so that when the bell crank lever is moved upon the pivot 23, the disk will be rotated.

Pivotally mounted upon the stand as indi- '15 cated at 26 is a plate 27 and this plate is connected to a plate 28 by means of a rod or wire 29. Pivotally mounted upon a bracket 30 which is secured to one of the legs 31 of the stand is a bell crank lever 32 and this lever is connected to the plate 28 by means of a rod or wire 33. Afoot engaging member 34 extends from the bell crank lever 32 and when this lever is depressed by pressure upon the foot engaging 5 member 34, the plates 27 and 28 will be moved pivotally so that the bell crank lever 24 will be operated to rotate the disk 18.

When the disk 18 is rotated, the mg 20 will engage the lowermost arm 16 and move the latter from its position shown'in Figure 2 of the drawings to a position upon the opposite side of the shaft 14. As the arms 16 carry sheet engaging clips 35 and as one of these clips is engaged with one of a plurality of sheets, the sheet so engaged will be turned. Rotation of the disk 18 will be yieldingly resisted by the spring 21' so that when pressure upon the foot engaging member 34 is released, the disk will be rturned Cir to its normal position. The spring 21 in addition to returning the disk to its normal position will also move the disk axially upon the shaft ll and cause the lug to engage the next succeeding arm 16 whereupon operation of this arm may be effected by pressure upon the foot engaging member 3i as previously described. A spring 36 serves to yieldingly resist action of the foot engaging member 3i and to return the parts to their normal positions.

In order to return the arms 10 to the position shown in the drawings, there is secured to the shaft ll an L-shaped arm 37. This arm is so shaped that it will simultaneously engage all of the arms 16 wnen the shaft 1i is rotated. Rotation of the shaft If is effected by means of a foot operated member 38 which extends from a bell crank lever 39 mounted for pivotal movement upon a bracket secured to the leg 31 which is similar to the bracket 30. This bracket is connected by means of a rod or wire 40 with a pivotally mounted plate i1 and the latter is connected by means of a rod or wire a2 with a pivotally mounted plate l3, the latter being mounted upon the pivot 26 and yieldingly held against movement by means of a spring ii.

The plate i3 is connected by means of a link 4:5 with an arm is and this arm is fast with a gear at? which is rotatably mounted upon the bracket 10. he gear 47 engages a gear l8 which is fast upon the shaft 1%, so that when the gear i7 is rotated by means of the foot operaten member 38, the arm 37 will be moved to return the arms 16 to their normal positions.

Rotary movement of the disk 18 under the action of the spring 21 is resisted by means of a stop i9 which is carried by the bracket 10.

The rail 11 is cut away as shown at 50 upon opposite sides of its center to accommodate the leaf engaging elements 35.

T he invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention what is claimed is:

1. In combination, a support, a rotatably mounted shaft, arms having their inner ends mounted for free rotary movement upon the shaft and arranged in superimposed relation, a disk mounted for free rotation upon the shaft, a cam flange carried by the disk to successively engage the arms and move the latter singly in one direction when the disk is rotated, means to rotate the disk, means secured to the shaft for engagement with the arms to move the latter simultaneously in the opposite direction, and means to rotate the shaft.

2. In combination, a support, arotatably mounted shaft, arms having their inner ends mounted for free rotary movement upon the shaft and arranged in superimposed relation, a spring influenced disk mounted for free rotary and axial movement upon the shaft, a cam flange carried by the disk to successively engage the arms and move the latter singly in one direction when the disk is rotated, means to rotate the disk, means secured to the shaft for engagement with the arms to move the latter simultaneously in the opposite direction, and means to rotate the shaft.

3. In combination, a support, a rotatably mounted shaft, arms having their inner ends mounted for free rotary movement upon the shaft and arranged in superimposed relation, a disk mounted for free rotation upon the shaft, a cam flangev carried by the disk to successively engage the arms and move the latter singly in one direction when the disk is rotated, means to rotate the disk, an L-shaped arm fast upon the shaft to simul taneously engage and move the arms in opposite directions when the shaft is rotated, and means to rotate the shaft.

In testimony whereof I aliix my signature.

METRO YAHOLNITSKY. 

